Acidity-test machine



Jan. Z6 1926. 1,570,717 v D. w. SUTHERLAND, JR

ACLDITY TEST MACHINE Filed May 1, 1924 atto: neg

Patented Jan. 26, 1926.

DONALD W. SUTHERLAND, JR., l0F SIOUX FALLS, vSOUTH DAKOTA.

normar-TEST MACHINE.

. Application filed May 1,

T0 all whom t may concern.'

Be it known that I, DONALD WV. SUTHER- LAND, J r., a citizen of the United States, residing at `Sioux Falls, in the county of Minnehaha and State of South Dakota, have invented'V certain new and useful Improvements in Acidity-Test Machines, .of which the following is a specification.

This invention relates to certain new and useful improvements in acidity test machines and pertains more particularly to a machine for testing the yacidity of cream and milk.

The primary object of the invention isto provide a machine of this type which enables testing in an easy and quick manner and to further provide a machine which is of simple, compact and economical construction.

A further object of the invention is to provide means for enabling the container for the cream or milk to be easily and quickly removed and accurately repositioned for further use, and to also provide novel means for holding the movable parts of the machine in a stationary predetermined position while the machine is out of operation or during removal of the liquid container and replacement thereof.

The invention has still. further and otherobjects which will be later set forth and of themselves manifested in the course of the following description.

Figure 1, is aside elevation of the invention, and

Figure 2, is a top plan view thereof.

In proceeding in accordance with the present invention, a base plate 1 is employed which may be provided with depending feet 2. A vertical scale or plate 2 provided with two spaced series of graduations 3 and 41 is fixed to one end of the base' plate, while the opposite end thereof is provided with a substantially J-shaped guide 3 that extends along the rear side and laterally of the base plate. A cup-like container 5 for reception of the milk or cream to be tested is freely received on the base and in the curved end or leg 6 of the J-sha ed guide.

A lever 7 is pivote intermediate its ends on a pin 8, the latter being supported by vertical members 9 rigidly secured to the base plate 1. Pin 8 has tapered ends received in nuts .8 carried by the vertical members 9. 'flic ,forward end 0f 'the lever ,is .llryel .at

1924. 'Scrial No. 710,306.

10 and forms a support for an indicator l1,

the latter being formed of a horizontal arm lie opposite to the respective series of grady uations. The opposite end of the lever is formed'with an upwardly extending arm 13, y 'the latter curving downwardly at 14 and `carrylng a float' 15 yon its free end. The

float 15 operates in the cupy 5, while the guide end 6 is positioned relative to the float so that when the'cup isengaged with the guide end as depicted in Figures 1 and 2 of the drawings, the float will be accurately `positioned in the center of the cup.

One of the bearings 9 is formed with an extension to which is pivoted a latching arm 15', the latter having one end engageable beneath the rear end of the lever while its opposite end is twisted to form a horizontal finger grip 17. A catch 18 is pivoted at 19 to the base plate and is engageable with the finger grip to hold the lever and floatA in the dotted line position depicted in Figure 1 of the drawings. A coil spring 21 tensions the catch to hold same in latching position.

The two scales are graduated for sweet and sour readings and the graduations are inclined so as to be in register with the various positions of the indicator arm during movement of the lever about its pivot.

In operation, in the instance of sweet cream, or milk 17.6 cubic centimeters are placed in the cup and in the instance of sour cream or milk 9.0 cubic centimeters. In the case of sweet milk or cream three or four drops of a '10% solution of phenolpthalein in ethyl alcohol are added and then a neutralizing solution N/Me NaOH, until a slight pinkish color is noted. The cup is now engaged with the guide, and the catch released, whereupon the ioat is lowered and the reading taken at the sweet scale. In thel case of sour cream or milk, the same operation occurs, the acidity reading apipearing on the sour scale in cubic centimeters.

What is claimed is:

1. In an acidity testing machine, a base, a vertical scale plate on the base having spaced vertical series of sweet and sour graduations, a lever pivoted between .its ends to the base, a horizontal pointer one end of the lever operating in the Space between the two series ot gradnations, a substantially l-shaped guide on the base plate adjacent the opposite end of the lever, a liquid holding cup Jfreely movable on the base and in the guide, the said opposite end of the lever extending upwardly and being` curved downwardly,- a float on said curved end of the lever receivable in the Cup, a latehing arm pivoted on' the base plate and engageable beneath the lever to hold the float in up position, and a spring tensioned catch engageable with the arm.

9,. In an acidity testing machine, a base, a vertical scale plate on the base having spaced vertical series of sweet and sour7 graduations, a lever pivoted between its ends to the base, a horizontal pointer on one end of the lever operating` in the space between the two series of gradnations, a substantially f J-shaped guide on the base plate adjacent the opposite end of the lever, a liquid holding cup freely movable on the base and in the guide, the said opposite end of the lever extending upwardly and being Curved downwardly, and a float on said curved end of the lever receivable in the cup.

In an acidity testing machine, a base, a vertical scale plate on the base, a lever pivoted between its ends to the base and having a pointer on one end cooperating` with the scale plate, a cup on the base, va float on the other end of the lever receivable in 'the enp a latching` arm pivoted to the base plate and engageable at one end beneath the lever to hold the float upwardly above the Cup to allow the latter to be moved out Aof register with the tloat5 and a Catch engageahle with the opposite end of the arm to hold the latter in operative position. A

In testimony whereof I altix my signature.

DONA'LD'IV. SUTHERLAND, Jn. 

